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dc.contributor.advisorBen-Zvi, Ilanen_US
dc.contributor.authorJohnson, Elliott Curtisen_US
dc.contributor.otherDepartment of Physics (Scientific Instrumentationen_US
dc.date.accessioned2013-05-22T17:34:51Z
dc.date.available2013-05-22T17:34:51Z
dc.date.issued1-Dec-11en_US
dc.date.submitted11-Decen_US
dc.identifierJohnson_grad.sunysb_0771M_10780en_US
dc.identifier.urihttp://hdl.handle.net/1951/59709
dc.description59 pg.en_US
dc.description.abstractAs in many resonators, higher-order modes (HOMs) occur in particle accelerator radio frequency (RF) cavities. The excitation of these harmonics causes additional heat loads in cryogenic systems and can result in problematic single bunch and multi-bunch effects. It is therefore critical to understand HOM prevalence and structure, and devise a method of extracting their power from the accelerator cavity. Research on these topics is ongoing in the Collider-Accelerator Dept. at Brookhaven National Laboratory (BNL), where the construction of an Energy Recovery Linac is underway. An HOM coupler implementing a dual-ridge waveguide has been designed for use on the next-generation ERL cavity. A full description of the design from its early stages is given, along with simulated analysis of its performance. Also, to better understand resonances occurring in the existing ERL, a measurement routine was developed to characterize and identify HOMs using a bead-pulling technique on a copper prototype cavity. Initial results of these measurements show a good correspondence with the harmonics predicted by the simulation code CST Microwave Studio.en_US
dc.description.sponsorshipStony Brook University Libraries. SBU Graduate School in Department of Physics (Scientific Instrumentation. Charles Taber (Dean of Graduate School).en_US
dc.formatElectronic Resourceen_US
dc.language.isoen_USen_US
dc.publisherThe Graduate School, Stony Brook University: Stony Brook, NY.en_US
dc.subject.lcshPhysicsen_US
dc.titleHigher-Order Modes in the BNL Energy Recovery Linac: Measurement and Waveguide Coupler Designen_US
dc.typeThesisen_US
dc.description.advisorAdvisor(s): Ben-Zvi, Ilan . Committee Member(s): Du, Xu; Koch, Peter M. Tsybychev, Dmitrien_US
dc.mimetypeApplication/PDFen_US


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